How do I supply the geometry of my parts and sheets to NestLib? Can I input multiple closed contours for a part?

The geometry is input to NestLib® through APIs as a series of lines, arcs and circles. Application can read user-specific geometric file formats and use the NestLib® APIs to input the geometry to NestLib®. It is also possible to input multiple closed contours for a part (outer contour and multiple inner contours or holes).